Semiconductor data storage apparatus

Static information storage and retrieval – Read/write circuit

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Details

36518904, 36518907, 36523003, 36523006, 365239, G06K 1907

Patent

active

055597386

ABSTRACT:
A semiconductor data storage apparatus having a plurality of memory devices which are switched to a predetermined mode when a software command has been written, which have waiting time during execution of the command after the command has been written and from which data can be collectively erased, the semiconductor data storage apparatus being arranged to shorten the time required to erase data. A memory device is activated in response to a memory selection signal supplied by a decoder, a write enable signal, which has been, by an AND gate circuit, selectively supplied in response to the selection signal, brings the memory device into a write mode, upper address signals are sequentially switched during a waiting time during execution of erasure after an erase command has been written so as to sequentially write erase commands on next memory devices by the decoder and AND gate circuits.

REFERENCES:
patent: 4931997 (1990-06-01), Mitsuishi et al.
patent: 5355342 (1994-10-01), Ueoka
patent: 5363330 (1994-11-01), Kobayashi et al.
patent: 5426753 (1995-06-01), Moon

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